About twice what it needs to be. Unless you have a very big flying field, it is preferable to have the plane circle the same way on the way up and on the way down. It will keep its shape once it dries out. Make similar marks on the opposite edge of the wing, so both the leading edge and the trailing edge are marked. This is a good time to file off any sharp edges, too. This one happened to be a fairly stiff piece of balsa. A hard throw will result in a zooming, nose up stall and a fall. They can be found online. You might like to have the pilot on your plane. The motor in particular is from stock rubber strip. You can also wrap rubber bands around your fingers to get a better grip on the parts. Step forward, moving your arms forward for a gentle push, releasing the propeller first and then immediately releasing the airplane. Transfer those marks to the opposite edge of the wing.
As you put in more turns, the torque of the motor increases. Apply a drop with a toothpick. After that, everything slips together according to the instructions. guillow l569 listia streak balsa First I will show you how to adjust it to get good flights out of it unmodified. See them at the Guillows site here: If you buy them from Guillows online, consider getting a bag of extra motors and 6 props as well. The original reason for making a new motor was to use a better quality rubber. Wood is stronger in the direction of the grain, so it is preferred to have the grain run vertical. Pull the second knot up tight against the first knot. If it does that, something is unsymmetrical. Weigh it down with soup spoons to keep it under water. I have worked up to as many as 400 turns. They have produced an instructional sheet for the Sky Streak, showing how they bend the wing tips up to improve lateral stability. Align the high point mark on the wingtip with the high point line on the form. I slide the wing as far forward as possible and make a mark above the slot at the wing leading edge. As you increase the turns and torque of the motor, you will begin to see the plane climbing less, not more. Every few minutes check the wood for flexibility. If the plane does not climb at all, move the wing forward closer to the propeller. We want the high point 40% back from the leading edge on a 2 wing, so that is 0.8 or approximately 13/16. Soak it to remove the paper, or cut the plastic off with a razor blade. 
I hadnt thought of this until now, but you could link two kit motors together to get a motor twice as long. If you do this, you cant take the wing off and you cant add camber for more lift, as I show you later. You will need to scavenge a D6 propeller assembly or remove your D5 propeller from its hanger and replace it with a D6. After that, I wonder why I should post anything more about the Sky Streak on EndlessLift. airplane balsa kits rubber band guillows bullseye biplane jetfire glider wood streak wind powered sky toys planes bundle sunny Later I decided that 3/32 strip is better.). Since the plane is banked to the left, a left turn is a downward turn. AMA EDCOM I have got 400 turns on a lubricated motor, but some do not seem to be able to take more than about 300. streak sky guillow balsa pack I say slightly because the Sky Streak is a fairly heavy airplane that must fly fast to stay up. It is convenient to count turns by tens. It will buckle and break if it is forced straight into the slot. We want to leave the dihedral curve as is. The first thing to establish is the wing position. The area of the wing pattern must be (4.496/33.2) 169.775 = 22.99 square inches. Start on the trailing edge, then transfer the marks to the leading edge with a right angle, using something like the drafting triangle. streak balsa glider Tie a simple overhand knot in the two strands, as close to the end as you can. You can read about those elsewhere on this site. A good place to start would be the AMA Cub series on EndlessLift. A larger propelleracceleratesa larger volume of air by a lesser amount and is more efficient. Dave Gee, who is on the AMA Education Committee, has produced a YouTube video showing him assembling a Sky Streak according to the AMA instructions. Now that we have got successful flights out of our Sky Streak, we want to find ways to get longer flights. It turns more slowly, lengthening the motor run. Put the wood grain vertical for strength. Motors must be protected from light. 
Sometimes you can push the knot closer to the end by pulling the rubber between your fingers. Slide it in rather than pushing it straight down. The wing pattern weighed 4.496 grams. Once the wood is dry, it is hard to untwist. It can move back and forth in the slot. Lube relieves the internal stresses in the motor, allowing many more turns without excess torque. You can also slide the wing a bit to the left. Itoccurredto me that most kids would not have easy access to preformed balsa airfoil forms or the ability to make their own forms. We will be modifying the wings to a quasi-polyhedral (tip dihedral) and upgrading to Tan II Sport for outdoor flying. This can be prevented by gluing the motor hook down. The wing has a note on it WARP THIS EDGE DOWN IF PLANE DIVES LEFT. The motor and propeller will take it from there. CA glue is the fastest way to do it, but any glue will work, as long as you use plenty of glue and give the glue time to dry before putting a motor on the hook. I would prefer more depth to the curve, but thats about all that can be had with this stiff piece of wood. Put a tiny bit of light machine oil on the prop shaft and bearing. The stock wing has 6.4 degrees of dihedral angle under each wing. The motor must be wound fairly tightly. First put marks along one edge of the wing 5 in from each tip. I had the experience of having the motor hook slide up through the wood so I couldnt get the motor on the hook. Place a weight on the block to keep it flat. Wind the Ace bandage at an angle to the board. The outer wing panel was soaked in water to soften the wood, then it was strapped onto a curved form with an Ace bandage to shape the curve, and allowed to dry. The rudder can be offset by about half the thickness of the wood sheet. Straighten it and remove it entirely from the wood. This angles the left wing more into the airflow, so it gets more lift and counters the left torque roll. Place it so the rudder is deflected to the right, since we want a right turn. Flying and Improving Your Guillows Sky Streak. Continue counting in the same way, One, two, three, four, five, six, seven, eight, nine, TWO, one, two, three, four, five, six, seven, eight, nine, THREE, one, two, three, four, five, six, seven, eight, nine, FOUR, , one, two, three, four, five, six, seven, eight, nine,FIFTEEN. That is fifteen tens, or 150 turns. This can cause breakage of the parts. toys flying airplanes jetfire streak balsa rubber sky band wood copter windup bundle powered play sports outdoor Check the camber. One way to measure the wing area is to trace the wing onto a thin sheet material of known, uniform density, cut out the pattern and weigh it. The new hook looks like this. Soak the whole wing in a cookie pan of water. Designed by Elegant Themes | Powered by WordPress. The plastic prop hanger will eventually return to its original position. You are putting more turns and energy into the motor and getting shorter flights! I found that it worked without the glycerin, but like all liquid soaps, it dried out quickly. You can see that the kids are having a blast. The plane is now complete and ready for test flights.
Then you may have a roll to the right. balsa guillow mfrpartno This motor must be wound using a winder and stooge. Take a close look from the front and top. Write the label. I found that the wet glue on the top of the balsa sheet wing warped it into shape as if it had been bent on formers! Refer to any model plan showing a wing rib. There may be situations where you will deliberately want something off center, but you still need to know where the center is. If a motor gets in dirt, wash and relube it before the next flight. I found that it could be used if it was refreshed before every flight. You wont be able to get much curve near the center. balsa wood powered rubber band jetstream glider plane The AMA breaks the wings and bends the tips up to increase the tip dihedral. toys balsa rubber wood airplanes powered band gliders jetfire streak sky planes glider bundle foam flying play sports outdoor Softer wood would have allowed more curve in the wing. BTW, a friend who teaches Lego Robotics is now interested in what youve done here so your mission of teaching kids about aeronautics continues. Put the hinge wires on the right side of the fin to bend right for a right turn. The greatest camber would be 1/6, approximately 5/32, located 0.8, approximately 13/16, from the leading edge. (I put marks 5 from the wingtip, not necessary.). It slips together in less than two minutes without glue, pins or sharp tools. Such a great source of information you have given us. balsa guillow This weight is the same fraction of the total weight of the sheet as the wing pattern area is to the area of the whole sheet. This prop size is too small for the wing area. You are now ready to launch the plane. The inside ends of the boards are held flat to the table top with a little weight. I will camber the wings and put in dihedral, as well as add the other modifications before the event. I am continually impressed with Garys devotion to kids and flight and have begun looking again for an indoor venue.
Gary: Thanks for publishing all this. Place the trailing edge of the rudder on top of a shim to space it up off the table by the amount you want the rudder to be deflected. Start by filing the cut sharp end off the wire, as usual. (Some day you will want to deliberately twist wings. There is no printing on these parts, so you can decorate them as ever you like. If you put in too many turns, the motor will break. Roll the wire between blocks to straighten it. Also mark 3/32 on either side of the center. Check that everything is symmetrical. It would be better to have a bit more camber in the wing. The right hand helix starts on the circle just opposite the straight piece and comes out just enough to clear the O-ring that will be used on the longer motor. Set the rudder to just overcome the excess left turn and maintain a left circle. Competition flyers also make their motors longer than the distance between the hooks to get more turns in. airplanes balsa wood bullseye guillows glider jetfire biplane airplane toys streak wind rubber powered sky band planes bundle sunny It is unlikely to dive right. airplanes streak jetfire powered balsa wood rubber band windup guillow bundle sky toys copter flying Adjust everything to be straight and symmetrical. Because it is the thrust of the propeller that is causing this right turn, when the motor winds down, the right turn will disappear and the plane will descend in a left circle, making an overall figure 8. The heavier prop will require the wing to be moved forward. Nothing better to help celebrate a nice day, these inexpensive flying toys will provide many hours of outdoor excitement. Place the tip ends of the form boards on the 1 1/2 blocks and place the jar of water on the center of the wing. Although the curved edge of the fin is supposed to go into the slot (above), I put the straight edge into the slot and use the curved edge as a trim tab (below). You can shift it slightly with your fingers. Fill a jar 5 deep with water. With these techniques, they can get much longer flights. You can sand the sheet parts to thin them. I am teaching Robotics and AeroModeling was looking upon some information on how to improve the flight performance. The Sky Streak is a fairly heavy airplane for its size. balsa propeller Make sure it is centered and square. Save the others for other projects. 50+ years later, I decided to give it another go with my 4.5-year-old grandson and the initial results were pretty much what I remembered. Unit 15, Heybridge House Industrial Estate, Push something like a hat pin into the bottom of the stick where you want the hook. The center was supported on a 3/4 x 1 1/2 x 3 block of wood to keep the inside ends of the forms off the table top. Grab the tag ends tightly with a clothespin and pull hard. And more dihedral to provide more roll stability. First flight spun in to the right. ROG flights wont work in wind. Simply grab the prop hub and the nose and bend the hanger so the prop shaft points to the right. On closer inspection I found that the reflexed end of the prop hook was hitting the plastic bearing box. (???!) Let it soak until the wood becomes flexible, 10 or 15 minutes. Slip an O-ring over the end and slide it down out of the way. The launch needs to get it only up to flying speed. You can try a few hand launches with the wheels on until you are satisfied that everything works. That is why it is important to have pencil markings on the wings and fuselage slot. This can be especially bad with an unlubed motor. balsa guillow airplane The hobby shop had Strato Streak planes, but since the same instructions will work, I went ahead and bought four, one for a kid in the neighborhood, three for me and two friends to play with at Lagunita. You can store your motors in plastic baggies if they are kept in a light tight box or tin. Put stooge and winder in the search window. Twisting the whole wing can have the same effect. A figure 8 is hard to fit on a small flying field. Mark the position of the high point of the camber near each end. You will notice a change at first, but after a while you will not notice any further change. It gets camber and dihedral at the same time and does not need all the measuring and marking. Do the same with the other wing and form.
.jpg){kind=link}
The left sideslip produces more lift under the angled left wingtip, countering the left torque roll before it goes too far. We cant bend balsa sheet in two opposite ways at once, so the center of the wing must remain straight across the middle to maintain the bend upward to the tips. It makes it easier to overcome the torque roll of the wound motor. I decided to try bubble soap because it is likely available in many of the places where you would find Guillows toy planes. Check yours before putting it on the plane. It is good to know about all of them. balsa plane wood streak guillow sky The plane will roll in a circular arc. My first cambered wing was made with forms. The jar must be exactly perpendicular to the wing span, unless you want a little built in roll. Now you can add more turns to get longer, higher flights. balsa guillows gliders jetfire streak guillow schylling pickrightly With a little more right thrust, you will be able to make the plane climb in a right circle. 4) Sanded empennage to save weight and for easier trailing edge adjustments. Tape the other end down. This is a 12 length of Sig airfoil balsa. The density of the balsa wood parts can vary, making different center of gravity locations and making different wing position settings necessary to achieve proper balance. balsa guillow streak When it is soft enough to form, blot the surface dry. Having a full circle with a slight overlap reduces the chance of the motor coming off the hook. Also look at the wing from the front. Considering the difficulties I had launching the plane while trying to operate the video camera, I decided to follow Daves lead and increase the dihedral to improve stability. streak balsa guillow no50 The AMA sells Sky Streak kits with the instruction sheet included, as well as a motor of 1/8 contest rubber. With 150 turns in the motor, the plane should climb slightly and circle to the left with the wings banked slightly down to the left. A right-right flight pattern can be accomplished with a bit of right thrust for right turn in the climb and a bit of right rudder to maintain right turn in the glide. The water soak did not fill in the holes in the wood. Hold the wing close to the fuselage as you work a bit of it clear through the slot. balsa It should be slid into the slot. There were scratches on the box. If you stop then, you will get many happy flights out of that motor. powered rubber band ag plane wings truck My ultimate Sky Streak originally had a 6 prop, a 14 loop of 1/8 rubber, cambered wings, an improved motor hook and a bendable rudder. I will tell you about that later.) Pull the strands apart to move the knot to about 1/8 from the ends. After flying with the 1/8 motor I found that it was thicker than necessary. Once you have got your Sky Streak flying well you will have mastered many elements of miniature aircraft aeronautics. Soak the other half of the wing and repeat the process with it. We want the motor to be free to unwind without rubbing on the stick, so we must make a hook that holds the motor farther from the stick. You can use the thin wire that comes in some bread bag or vegetable ties. About the only construction work required is to punch the tailplane, fin and pilot figure out of the parts sheet. The Sky Streak is available from Guillows in three forms of packaging; apoly baggedsingle, a double boxed set or in their Air Plane Design Studio, which contains parts to make four Sky Streaks, including landing gear that is not included in the other two sets. ), When you are satisfied with the shape of this wing, put the other end in the water and shape that wing. Dip a couple inches of the rubber into the lube. I remember buying the Strato Streak for $0.25 back in the day. balsa streak guillow avion modellers The wrong amount of right rudder can have the same effect as the wrong amount of right thrust; the plane will arc to the right into the ground, or it may zoom straight up into a stall.
